No X-ray source is detected at the position of SN 2006at in a simultaneous
1,480 s XRT observation. The 3-sigma upper limit to the count rate is
6.2E-03 cts/s, corresponding to an unabsorbed (0.2-10 keV) X-ray flux of
3.3E-13 ergs/cm/cm/s for an assumed thermal plasma spectrum with a temperature
of 10 keV and an absorbing foreground column density of 1.87E+20 cm**-2
(Dickey & Lockman 1990, ARAA 28, 215).